diff --git a/backend/package.json b/backend/package.json
index 2399c89..0bc242d 100644
--- a/backend/package.json
+++ b/backend/package.json
@@ -1,6 +1,6 @@
 {
   "name": "sub-store",
-  "version": "2.14.90",
+  "version": "2.14.91",
   "description": "Advanced Subscription Manager for QX, Loon, Surge, Stash and ShadowRocket.",
   "main": "src/main.js",
   "scripts": {
diff --git a/backend/src/restful/download.js b/backend/src/restful/download.js
index 0bdc2e3..bf9e6d7 100644
--- a/backend/src/restful/download.js
+++ b/backend/src/restful/download.js
@@ -20,6 +20,16 @@ async function downloadSubscription(req, res) {
         req.query.target || getPlatformFromHeaders(req.headers) || 'JSON';
 
     $.info(`正在下载订阅：${name}`);
+    const { url, ua, content } = req.query;
+    if (url) {
+        $.info(`指定 url: ${url}`);
+    }
+    if (ua) {
+        $.info(`指定 ua: ${ua}`);
+    }
+    if (content) {
+        $.info(`指定 content: ${content}`);
+    }
 
     const allSubs = $.read(SUBS_KEY);
     const sub = findByName(allSubs, name);
@@ -29,12 +39,15 @@ async function downloadSubscription(req, res) {
                 type: 'subscription',
                 name,
                 platform,
+                url,
+                ua,
+                content,
             });
 
-            if (sub.source !== 'local') {
+            if (sub.source !== 'local' || url) {
                 try {
                     // forward flow headers
-                    const flowInfo = await getFlowHeaders(sub.url);
+                    const flowInfo = await getFlowHeaders(url || sub.url);
                     if (flowInfo) {
                         res.set('subscription-userinfo', flowInfo);
                     }
diff --git a/backend/src/restful/sync.js b/backend/src/restful/sync.js
index 51a0932..fbff455 100644
--- a/backend/src/restful/sync.js
+++ b/backend/src/restful/sync.js
@@ -22,14 +22,18 @@ export default function register($app) {
     $app.get('/api/sync/artifact/:name', syncArtifact);
 }
 
-async function produceArtifact({ type, name, platform }) {
+async function produceArtifact({ type, name, platform, url, ua, content }) {
     platform = platform || 'JSON';
 
     if (type === 'subscription') {
         const allSubs = $.read(SUBS_KEY);
         const sub = findByName(allSubs, name);
         let raw;
-        if (sub.source === 'local') {
+        if (url) {
+            raw = await download(url, ua);
+        } else if (content) {
+            raw = content;
+        } else if (sub.source === 'local') {
             raw = sub.content;
         } else {
             raw = await download(sub.url, sub.ua);